Halo 4 Campaign Won't Work

So I got Halo 4 probably a couple weeks after it was released. I never played the campaign much and just stuck to the multiplayer. The other day I was playing the campaign and it let me play up to the mission Reclaimer but when I try to start it, it says that “players have failed to load content. A player may be missing downloadable content.” I have been looking online and it seems like they released a bunch of defective copies. Is there anything I can do? The disk does have a big circle on the underside but it isnt a scratch, the disc came like that. I don’t have the receipt because it was a gift but this is ridiculous. I have installed the game multiple times and deleted it off my hard drive. The console is not the problem. Please help!!!

Ooooh. Does the circle look like this? If yeah, then I think your disc might have a laser burn. But from what I heard, its repairable.